This is taken from her Find a Grave Biography. Source below The author is unclear.
Born in Cumberland region of Maryland and present-day West Virginia d/o Joseph Becker and Wilhelmina Fuchs Becker w/o (2nd) John Sexton m/o Wilhemina Sexton Voyer, Hanora Ellen Sexton Thornton, John Sexton, Johanna Sexton Hall, Sarah Sexton, Thomas P. Sexton, Edmund W. Sexton, Margaret Rose (Sister Venantia) Sexton, Helen Josephine Sexton, Walter M. Sexton, Clara A. Sexton, and Francis Leo Sexton
Birth date on this memorial was originally listed as July 5, 1853, and that birth date is listed on her death certificate. Birth year on gravemarker is also 1853. See notes below about birth date discrepancy.
From FamilySearch Tree Person ID LCC1-B6R (as of June 11, 2014)
Mary Elizabeth Baker was born under the name Julianna Becker, daughter of Joseph Peter Becker and Wilhelmine Fuchs on April 26, 1855 in Cumberland, Maryland. Julianna was only 5 months old when her mother died. She may have been named Julianna because her Godmother was Juliana Mueller.
When Julianna's father Joseph Peter Becker married a second time to Mary Ann Redmond on 12 June 1856 in Cumberland, Maryland, the family had taken the Baker surname and Julianna's name was changed to Mary Baker.
On 30 Jun 1860, Mary Baker is living at home with her father and new mother in Lauraville, Allegany, Maryland. She is 7 years old. Calculated, her birth year would be ca 1853 which is different from her church birth and christening record. The census says she was born in Maryland.
4 Aug 1870, Mary Baker is 15, born in Maryland. She and her family have relocated to Wabasha, Minnesota.
Mary Baker married John Sexton November 8, 1873 in Wabasha, Minnesota.
All records for Mary (Baker) Sexton after her marriage to John Sexton say she was born in 1853 in West Virginia, but her birth/christening church record from Saints Peter and Paul Catholic Church in Cumberland, Maryland recorded her birth as April 26, 1855 in Cumberland, Maryland. It is unknown why her birth date and place changed.
Mary was the second wife of John Sexton
See also: * https://www.findagrave.com/memorial/12091423/mary-elizabeth-sexton
Based on the above, as well as the bio, these profiles appear to represent the same person. Would need to review and sort out correct version of name prior to a merge.